Let's roll up our sleeves and solve this. We have 93 and we're going to multiply it by 81, essentially adding 93 to itself 81 times.
Step 1: 0 + 93 = 93
Step 2: 93 + 93 = 186
Step 3: 186 + 93 = 279
Step 4: 279 + 93 = 372
Step 5: 372 + 93 = 465
Step 6: 465 + 93 = 558
Step 7: 558 + 93 = 651
Step 8: 651 + 93 = 744
Step 9: 744 + 93 = 837
Step 10: 837 + 93 = 930
Step 11: 930 + 93 = 1023
Step 12: 1023 + 93 = 1116
Step 13: 1116 + 93 = 1209
Step 14: 1209 + 93 = 1302
Step 15: 1302 + 93 = 1395
Step 16: 1395 + 93 = 1488
Step 17: 1488 + 93 = 1581
Step 18: 1581 + 93 = 1674
Step 19: 1674 + 93 = 1767
Step 20: 1767 + 93 = 1860
Step 21: 1860 + 93 = 1953
Step 22: 1953 + 93 = 2046
Step 23: 2046 + 93 = 2139
Step 24: 2139 + 93 = 2232
Step 25: 2232 + 93 = 2325
Step 26: 2325 + 93 = 2418
Step 27: 2418 + 93 = 2511
Step 28: 2511 + 93 = 2604
Step 29: 2604 + 93 = 2697
Step 30: 2697 + 93 = 2790
Step 31: 2790 + 93 = 2883
Step 32: 2883 + 93 = 2976
Step 33: 2976 + 93 = 3069
Step 34: 3069 + 93 = 3162
Step 35: 3162 + 93 = 3255
Step 36: 3255 + 93 = 3348
Step 37: 3348 + 93 = 3441
Step 38: 3441 + 93 = 3534
Step 39: 3534 + 93 = 3627
Step 40: 3627 + 93 = 3720
Step 41: 3720 + 93 = 3813
Step 42: 3813 + 93 = 3906
Step 43: 3906 + 93 = 3999
Step 44: 3999 + 93 = 4092
Step 45: 4092 + 93 = 4185
Step 46: 4185 + 93 = 4278
Step 47: 4278 + 93 = 4371
Step 48: 4371 + 93 = 4464
Step 49: 4464 + 93 = 4557
Step 50: 4557 + 93 = 4650
Step 51: 4650 + 93 = 4743
Step 52: 4743 + 93 = 4836
Step 53: 4836 + 93 = 4929
Step 54: 4929 + 93 = 5022
Step 55: 5022 + 93 = 5115
Step 56: 5115 + 93 = 5208
Step 57: 5208 + 93 = 5301
Step 58: 5301 + 93 = 5394
Step 59: 5394 + 93 = 5487
Step 60: 5487 + 93 = 5580
Step 61: 5580 + 93 = 5673
Step 62: 5673 + 93 = 5766
Step 63: 5766 + 93 = 5859
Step 64: 5859 + 93 = 5952
Step 65: 5952 + 93 = 6045
Step 66: 6045 + 93 = 6138
Step 67: 6138 + 93 = 6231
Step 68: 6231 + 93 = 6324
Step 69: 6324 + 93 = 6417
Step 70: 6417 + 93 = 6510
Step 71: 6510 + 93 = 6603
Step 72: 6603 + 93 = 6696
Step 73: 6696 + 93 = 6789
Step 74: 6789 + 93 = 6882
Step 75: 6882 + 93 = 6975
Step 76: 6975 + 93 = 7068
Step 77: 7068 + 93 = 7161
Step 78: 7161 + 93 = 7254
Step 79: 7254 + 93 = 7347
Step 80: 7347 + 93 = 7440
Step 81: 7440 + 93 = 7533

So, 93*81 = 7533